Safety razor



1,645,021 Oct. 11, 1927. E J. PETARD SAFETY RAZOR 2 Sheets-Sheet 1 Filed June 11, 1925 D. E. J. PETARD SAFETY RAZOR Oct. 11, 1927. 1,645,021

Filed June 11, 1925 2 Sheets-Sheet 2 Patented Oct. 11, 1927.

DANIEL ERNEST JOSEPH PETARD, F NICE, FRANCE.

SAFETY RAZOR.

Application filed June 11, 1925, Serial No. 36,361, and in France June 22, 1924.

My invention relates to improvements in safety razors and comprises the following novel features of construction and combination of parts.

1. The blade which is raised above the teeth of the guard plate is clamped at three lateral parts, the efi'ect of which is to prevent vibrations which produce irritation.

2. The convex upper surface of the guard has spacing projections of a suitable form which facilitate the passage of the removed hair, soap, etc., under the blade, thereby preventing damage to the cutting edge of the blade and clogging of the guard.

3. A conical end on the handle engaglng a conical opening in the guard ensures the perfect mechanical centering of the backing plate on the guard by the aid of a very long screw with a rapid pitch in order to expedite 1 the operation.

4. The same razor has several interchangeable guards of difi'lerent widths to permit of the use of blades worn to difierent slzes by sharpening, by choosing the guard of corresponding width. These difierences in the width of the guard are due solely to the fact that the teeth are of different lengths, all the other parts of the guards remaining identical.

5. The backing plate is equal in width to the spacing projections of the guard so that the blade can be diminished by successive sharpenings by the amount by which it projects beyond each edge of the backing plate. 355 In the accompanying drawings on which I have illustrated my invention by way of example:

Figure 1 is a longitudinal section on an enlarged scale, or a razor embodying the m- 42 vention,

Figure 2 a frag-mental end view thereof,

Figure 3 a view of the convex upper face of the guard,

Figure 4 a transverse section through the upper portion of the razor,

Figure 5v a similar sectional view illustrating a modification,

Figure 6 a side elevation of a razor equipped with an interchangeable guard, Figure 7 a top plan view of the guard,

Figure 8 a side view of the upper contour of the guard shown in Figure 7.

Figures 9, 10, 11 and 12, 13,14 are respectively similar views as Figs. ,6, 7 and 8, showing guards having difierentwidths.

The razor with the conical centering device (see Figure 1) comprises a guard 1 having an enlargement 1 containing a central conical bore 5 adapted to receive the conical end 2 of the handle 2 The latter is hollowed out and screw-threaded for a certain distance from its inner end so as to receive the screw-threaded shank 3 of the backing plate 3. The screw thread of the shank 3 is preferably of rapid pitch.

4 denotes the usual flexible two-edged blade adapted to be clamped between the backing plate 3 and the guard 1 by the turning of the handle 2.

The convex upper face of the guard 1 has spaced projections 1 1, 1' (see Figure 3) of a suitable curved outline, leaving between them room for the passage of the removed hair, soap, etc., beneath the blade 4, which by said projections is lifted free 0d the guard 6 and 7 are holes formed in the guard to receive the positioning ins 8 and 9 (see Figure 4) depending om the backing plate 3.

It will be seen that the raised blade 4: when clamped between the backing plate 3 and guard l is supported by the three spaced projections provided on the curved upper face of the guard, whereby any vibration of the blade adapted to cause irritation is edectively prevented.

On the other hand, the conical part of the handle entering and engaging the conical bore in the guard ensures a perfect centerof the backing plate.

11 the modification shown in Figure 5 a conical boss is formed on the guard adapted to enter a conical socket formed at the inner end of the handle 2 with the same result, to 95 wit, to ensure a perfect centering of the backing plate.

To enable blades which have become worn by successive sharpenings to be used the guard has been made a separate part so that each razor may be provided with a plurality of interchangeable guards of diflerent widths. According to the wear of the blade, the proper guard will be selected.

In that case the width of the backing plate 105 3 will be equal to the width of the spacing projections, 1, 1, l of the guards as shown in Figures 6, 9 and 12 while the diminution in the width of the guards will be obtained by a diminution in the length of their teeth (see Figures 8, 11, 14).

The blade 4 may thus be reduced through shar ening, by the amount a (see Figure 6) whic proiects beyond each side of the clamping p ate 3.

I claim In a safety razor, the combination of a handle having a long screw-threaded bore and a conically shaped inner end, a separate guard member having a central conical bore adapted to fit the conically shaped end of said handle, a backing element, and a long 1 screw threaded stem on said backing element adapted to engage the screw-threaded bore in said handle for clamping said backing element inposition on said guard mem- In testimony whereof he has aflixed his signature.

DANlEL ERNEST JOSEPH PETARD. 

